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https://github.com/Z3Prover/z3
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100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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ast_util.h
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Abstract:
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Helper functions
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Author:
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Leonardo de Moura (leonardo) 2007-06-08.
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Revision History:
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--*/
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#ifndef _AST_UTIL_H_
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#define _AST_UTIL_H_
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#include"ast.h"
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#include"obj_hashtable.h"
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template<typename C>
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void remove_duplicates(C & v) {
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expr_fast_mark1 visited;
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if (!v.empty()) {
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unsigned sz = v.size();
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unsigned j = 0;
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for (unsigned i = 0; i < sz; i++) {
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typename C::data curr = v.get(i);
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if (!visited.is_marked(curr)) {
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visited.mark(curr);
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if (i != j)
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v.set(j, curr);
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j++;
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}
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}
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v.shrink(j);
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}
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}
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app * mk_list_assoc_app(ast_manager & m, func_decl * f, unsigned num_args, expr * const * args);
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app * mk_list_assoc_app(ast_manager & m, family_id fid, decl_kind k, unsigned num_args, expr * const * args);
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bool is_well_formed_vars(ptr_vector<sort>& bound, expr* n);
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inline bool args_are_vars(app const * n) {
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unsigned sz = n->get_num_args();
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for (unsigned i = 0; i < sz; i++) {
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if (!is_var(n->get_arg(i)))
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return false;
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}
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return true;
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}
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inline bool depth_leq_one(app * n) {
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unsigned sz = n->get_num_args();
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for (unsigned i = 0; i < sz; i++) {
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expr * arg = n->get_arg(i);
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if (is_app(arg) && to_app(arg)->get_num_args() > 0)
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return false;
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}
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return true;
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}
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template<typename AST>
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void dec_ref(ast_manager & m, obj_hashtable<AST> & s) {
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typename obj_hashtable<AST>::iterator it = s.begin();
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typename obj_hashtable<AST>::iterator end = s.end();
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for (;it != end; ++it) {
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m.dec_ref(*it);
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}
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}
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template<typename AST>
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void inc_ref(ast_manager & m, obj_hashtable<AST> & s) {
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typename obj_hashtable<AST>::iterator it = s.begin();
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typename obj_hashtable<AST>::iterator end = s.end();
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for (;it != end; ++it) {
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m.inc_ref(*it);
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}
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}
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// -----------------------------------
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//
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// Clauses (as ASTs) support
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//
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// -----------------------------------
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bool is_atom(ast_manager & m, expr * n);
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bool is_literal(ast_manager & m, expr * n);
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void get_literal_atom_sign(ast_manager & m, expr * n, expr * & atom, bool & sign);
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bool is_clause(ast_manager & m, expr * n);
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unsigned get_clause_num_literals(ast_manager & m, expr * cls);
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expr * get_clause_literal(ast_manager & m, expr * cls, unsigned idx);
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#endif /* _AST_UTIL_H_ */
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